Baltisk (crater)
Baltisk is a crater in the Argyre quadrangle of Mars. It was named after a town in Russia in 1976. Baltisk is located on the western edge of the Argyre impact basin.
Impact craters generally have a rim with ejecta around them, in contrast volcanic craters usually do not have a rim or ejecta deposits. As craters get larger they usually have a central peak. The peak is caused by a rebound of the crater floor following the impact.